Rock Falls, IA Demographics

A map of Rock Falls's Population by Race

Rock Falls, Iowa has an estimated population of 119, a large decrease from the 150 recorded in the 2020 Census. The population is 100.0% White, 0.0% Black, 0.0% Asian, 0.0% Hispanic, 0.0% Native American/Other, and 0.0% Multiracial. This demographic dot map shows the population of Rock Falls, with one dot drawn for each person counted by the Census, color-coded by race.

Rock Falls has become considerably less racially diverse since the 2020 Census. It is considerably less diverse than Iowa overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Rock Falls, that probability was 7.8% in 2020 and 0.0% in the most recent ACS estimates.

Rock Falls is ranked the 828th most populous place in Iowa, out of 1,026 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Rock Falls was ranked the 765th most populous place in the 2020 Census.

Rock Falls's White Population

119 residents of Rock Falls, or 100.0% of the population, identify as White. The share of White residents in Rock Falls is significantly higher than in Iowa overall, where 82.3% of the population is White. Rock Falls ranks 180th statewide in terms of White residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Rock Falls's White population has declined by an estimated 17.4%. White residents' share of Rock Falls's population has increased from 96.0% to 100.0%.

Rock Falls is more White than neighboring Plymouth (97.1% White), Nora Springs (91.1% White), Grafton (95.2% White), and Mason City (84.9% White).

Rock Falls's Black Population

0 residents of Rock Falls, or 0.0% of the population, identify as Black. The share of Black residents in Rock Falls is slightly lower than in Iowa overall, where 3.8% of the population is Black. Rock Falls ranks 307th statewide in terms of Black residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Rock Falls's Black population has declined by an estimated 100.0%. Black residents' share of Rock Falls's population has decreased from 0.7% to 0.0%.

Rock Falls is less Black than neighboring Plymouth (0.7% Black), Nora Springs (4% Black), Grafton (1.5% Black), and Mason City (2.9% Black).

Rock Falls's Asian Population

0 residents of Rock Falls, or 0.0% of the population, identify as Asian. The share of Asian residents in Rock Falls is slightly lower than in Iowa overall, where 2.5% of the population is Asian. Rock Falls ranks 543rd statewide in terms of Asian residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Rock Falls's Asian population has grown from 0 to an estimated 0. Asian residents' share of Rock Falls's population has remained roughly unchanged at 0.0%.

Rock Falls is less Asian than neighboring Plymouth (0.2% Asian), and Mason City (1.3% Asian).

Rock Falls's Hispanic Population

0 residents of Rock Falls, or 0.0% of the population, identify as Hispanic. The share of Hispanic residents in Rock Falls is lower than in Iowa overall, where 7.3% of the population is Hispanic. Rock Falls ranks 487th statewide in terms of Hispanic residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Rock Falls's Hispanic population has declined by an estimated 100.0%. Hispanic residents' share of Rock Falls's population has decreased from 2.7% to 0.0%.

Rock Falls is less Hispanic than neighboring Plymouth (0.7% Hispanic), Nora Springs (2.9% Hispanic), Grafton (3.3% Hispanic), and Mason City (7% Hispanic).

Rock Falls's Native American/Other Population

0 residents of Rock Falls, or 0.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Rock Falls is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Rock Falls ranks 637th statewide in terms of Native American/Other residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Rock Falls's Native American/Other population has grown from 0 to an estimated 0. Native American/Other residents' share of Rock Falls's population has remained roughly unchanged at 0.0%.

Rock Falls is less Native American/Other than neighboring Mason City (1.3% Native American/Other).

Rock Falls's Multiracial Population

0 residents of Rock Falls, or 0.0% of the population, identify as Multiracial. The share of Multiracial residents in Rock Falls is slightly lower than in Iowa overall, where 3.5% of the population is Multiracial. Rock Falls ranks 929th statewide in terms of Multiracial residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Rock Falls's Multiracial population has declined by an estimated 100.0%. Multiracial residents' share of Rock Falls's population has decreased from 0.7% to 0.0%.

Rock Falls is less Multiracial than neighboring Plymouth (1.2% Multiracial), Nora Springs (2% Multiracial), and Mason City (2.6% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.